I=1/2  S-wave scattering   →   us   →     The signal at 1430 MeV almost disappears   in the slope of the huge signal at 800 MeV.  P. Estabrooks, Phys. Rev. D19, 2678 (1979),          and P. Estabrooks et al., Nucl. Phys. B133, 490 (1978).  D. Aston et al., Nucl. Phys. B296, 493 (1988).